Electric ignition apparatus.



P. R. SIMMS. ELECTRIC IGNITION APPARATUS. APPLIOATION FILED JULY 22, 1912.

Patented Dec. 30, 1913.

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FREDERICK RICHARD SIMMS, 0F WILLESDEN LANE, ENGLAND, ASSIGN OR TOSIMMS mncnn'ro 00., Inc,

OFNEW YORK, N. Y.

ELECTRIC IGNITION APPARATUS.

Specification of Letters'l'atent.

Patented Dec. 30, 1913.

Original application filed December 10, 1910, Serial No. 596,638. Divided and this application filed July 22,

1912. Serial No. 710,940.

To all whom it may concern:

Be it known that I, FREDERICK RICHARD SIMMS, a subject of the King of Great Britain, residing at Welbeck Works, Kimberley Road, Willesden Lane, Middlesex, England, have invented new and useful Improvements in Electric Ignition Apparatus, of which the following is a specification.

' This invention relates to electric ignition apparatus ofthe kind in which a magnetoelectric machine having an armature in the form of an induction coil and provided with a circuit breaker, has combined with it in external source of current, a trembler coil and controlling switch, the'latter being so arranged that the induction coil can be: brought under the influence of either the.

magnetic field of the magneto or of the cur rent from the external source for ignition purposes, or cut off from both.

According to my invention I provide an auxiliary circuit breaker for use when the external current source is used for ignition, the said auxiliary circuit breaker being arranged so that the circuit through the said external source is open when the main circuit breaker is closed, thus avoiding short circuiting the primary winding of the induction coil. In a suitable arrangement for carrying out the invention this auxiliary circuit breaker 1s arranged between the said external current source and primary winding and in the case where the main circuit breaker isin the form of a rotating arm carrying a brush designed to make and break contact with one fixed contact piece, or a series thereof, in circuit w1th the said prlmary wlnding, 1t embodies accompanying drawing, in which:-

Figure 1 is a diagrammatic view illustrating electric ignition apparatus, for a four cylinder internal combustion engine, embodying my improvements, and including a controlling switch of the kind described in my application for a patent Serial No.

596,638, of which this application is a division, the parts of the apparatus being shown in position for. utilizing the external source of current for ignition purposes,

Flgs. 2 and 3 are similar views to Fig. 1,

but respectively showing the parts in position for utilizing the magneto for ignition purposes and for cutting out both the said magneto and external source of current.

a is the armature of the'magneto and I), 0 respectively the primary and secondary coils thereon, (Z, (Z, (Z, (Z are the sparking plugs, one element of each of which is in connection with a brush e bearing upon the usual high tension distr ibuter f in connection with one ,end of the secondary coil 0 and the other element of which is in connection with the other end of the said coil as indicated by the dotted line or earth connection.

9, q are the contact pieces with which the brush it on the rotating arm i makes and breaks contact When the magneto is operattherewith, the said contacts and brush con stituting the main circuit breaker.

is is the external source of current in the form of an accumulator or battery and Z is the spring armature or trembler designed to be attracted by the electro-magnetm which is in circuit with the said battery.

n is the adjustable screw for makingcontact with the trembler Z and 0 is a condenser in connection with the coil of the magnet m for reducing sparking at the point of the said screw.

l, 2, 3, 4, and 5 are the terminals or contact pieces of the controlling switch described in the application above referred to,

1 and 2 being respectively connected to the positive and negative poles of the battery it. The terminal 4 is connected to one end of the primary coil 7) while the terminal 5 is connected to earth, as indicated by the dotted-line 7): a are forked contacts forming the rotatable portion of the controlling switch but insulated. from each other, the said forks being designed to make contact with the contact pieces 2, 3, 4, 5 as hereinafter described.

1', 1' are the contact pieces of the auxiliary contact breaker arranged concentrically with the pivot of the arm 2' ands is the brush car ried by the said arm to make contact with the said contact pieces, the-said pair of contact pieces 1', '1' being so arranged relatively to the pair of contact pieces g, g of the main ing and y is the condenser in connection w ously.

- current passes from the-said batter to the I ignition b the battery is the circuit through Copies of this patent may be obtained for live cents each, by addressing the commissioner of fiatenta,

Washington, D. 0."

contact breaker that the arm is never in circuit with both pairs of contacts simultane In the operation of the mechanism with the switch in position for effecting ignition by the battery is, as indicated in Fig. l, the

primary coil 6 of the magneto, an thence to a sparking plug, the current flowing by way of the magnet m, trembler Z, screw 12, fork p, contact 4, line 6, .coil 1), earth connections 7, 8 and 9, arm a brush .9, either contact 1-,. line l0,'contact 3, fork 9, contact 2 back to battery Zr. By operating the switch so as to bring one of the limbs of the fork g on to contact 3 and the limbs of the fork p into an intermediate position as shown in Fig. 2 the'ma ne'to only supplies current for sparking purposes in the usual manner, the main contactbreaker i, h 9 then functioning instead of the auxiliary contact breaker i, s, 1". For cutting out both the battery and the magneto the switch is operated to the position shown in Fig. 3 in which the limbs of the fork g are out of contact with the contacts 2 and 3 and the limbs of the fork p in contact with the contacts 4; and 5 whereby the primary coil 1) of the magneto is short circuited.

By the described arrangement of auxil-' iary contact breaker it will be evident that when the switch is in position for effecting the said a-ttery will 'be' maintained open when the main circuit breaker 2', "h, g is closed, thus. avoiding short circ'uiting the lace if the two circuit breakers were both cibsed. at the same time. It will also be evident that the ignition effected bythe batteryjc will be slightly later than that by the magneto.

Claims:

system.

Q 1; electric spark producing ap aratus comprismg an induction coil, means or producing a" magnetic field within which the said coil may rotate, an external source of current to excite the primary winding of said induction c011, and a trembler in circuit with said external source of current, a mam circuit breaker for said primary winding,

an auxiliary circuit breaker interposed between said external source of current and the primary winding and constructed to maintain the circuit through said external source of current open when the said main" circuit breaker is closed.

2. Inan ignition system provided with igniting devices, a high tension magneto, a main circuit breaker for the primary circuit of the magneto, an external source to excite the primary winding-of the magneto,

the accumulator circuit with 'the ignition 3. In an ignition system provided with igniting devices, a high tension magneto, a

mai n circuit breaker for the primary cir-' cuit thereof having a rotary part, an accumulator a trembler in circuit therewith an auxiliary circuit breaker therefor having a rotary part operatively connected with the circuit breaker in a predetermined relation so that the auxiliary circuit breaker'will hold the accumulator circuit open while the contacts of the circuit breaker are closed, and a switch for throwing. the magneto circuit or the accumulator circuit into action.

FREDERICK RICHARD SEEMS. 

